Heat-treating basket



March 11,1947. SARDO 1 "2,417,089

` HEAT TREATING'ASKET Filed oct. 25, 1945 INVENTOR. Car/0 Sardo -ATTRNL' Y i @3km-Wd Patented Mar. 11, 1947 UNITED STATES PATENT OFFICE 2,417,089@ HEAT-TREATING BASKET' Carlo Sardo, New York; Ni Application october 25, 1945r serial;No.` 62:1;614. 3 claims. (o1. actie-'4b (Granted under the'. act of March 3, 1883, as*

amended: April 30, 1928? 370- i Go 757) This in'ventohlif'e'lates' tov alieat treating' basket, a-device for` supporting articles during heat treate ment-s such as in molten salt baths, quenching baths, and the like.v

It'v is anobject ofthis inventionl to provide a heat treating baskethaving a minimum ofrigidity. I

Another objectief th-i'sfinvention` is to-provide a heat treating'l basket having minimumsuscep# tibility to the deleterious effects of expansion and contraction due to repeated and rapid changes of temperature over a wide range.

Still another object of this invention is to provide a heat treating basket comprising a plurality of replaceable units.

A further object of Vthis invention is to provide a heat treating basket which may be readily emptied while in an upright position.

Further objects and advantages of this invention, as well as its construction, arrangement and operation, will be apparent from the following description and claims in connection with the accompanying drawings, in which Figure 1 is a perspective view of the assembled basket of this invention; and

Figure 2 is a sectional View through the device, taken along the line 2-2 of Figure 1.

Referring to the drawings in detail, the heat treating basket of this invention comprises a central standard Il, having a plurality of tray members l2 extending radially from the lower end thereof. Tray members I2 are preferably slightly dished to prevent sidewise displacement of articles standing therein, and are provided with a plurality of holes I3 drilled therethrough to facilitate the movement of heat transfer fluid therethrough. At the upper end of central standard II may be provided a hook I4 and an eye I5, to facilitate lifting and suspending the device.

Slidably enclosing central standard II is a tubular or cylindrical member I6, `from which a plurality of retaining loops I'l extend radially. The retaining loops Il correspond in number and angular spacing with the tray members I2, and may be duplicated at various levels along the length of the cylindrical member I 6. Bar I8 extends upwardly from cylindrical member I 6 and terminates in handle I9. A number of workpieces 2t are shown in place in the device for heat treatment.

The lower set of retaining loops I 1 may be held in spaced relationship from tray members I2 by stop portion 2l, an enlarged section of central standard I I. Stop portion 2l may be of square cross section, and rotation of cylindrical member 2 I 6 relativeto central standard Ii maybe Drev'nted 'n1 cylindrical member le rests upon stop portion 2`I by li'p 22 on the lower side of cylindrical- Ii'leir'iberV I6, adapted to enclose the upper end2- of# stop portion 2 I.

The device may be utilized in the following manner. A plurality of workpieces 2`i`, illustrated as'eligfatd objects such as` chisel blanks, may bplaced lli` the heat" treati'r'i'gf basket by stand ihglth'ei-ir ontfiay members l2; the upper ends of the workpieces being supported by retaining loops I'I (Figure l). The retaining loops il are desirably made of convenient size and shape to enclose the type or types of objects customarily worked with. The entire device with workpieces in place may then be lowered into and suspended in a heating or cooling fluid, and may be withdrawn when desired, by means of hook lil or eye I5. When the heat treatment of workpieces 20 has been completed cylindrical member it and retaining loops I'l may be raised by means of handle I9 along central standard II until the loops Il clear workpieces 20, allowing the workpieces 20 to fall free of the device. The cylindrical member I6 and retaining loops ll may then be lowered into place by means of handle IQ and the device is ready for the placement therein of a new set'of Workpieces 2U.

The device is preferably made of metal, and desirably of metal having a relatively low c0- elicient of expansion. The component parts thereof may conveniently be assembled by welding. The upper end of central standard II, comprising hook I4 and eye l5, may conveniently be made an integral unit threadably engageable to the central section of standard II. In such case, the hook and eye unit is readily removable, permitting removal and replacement of the sliding assembly comprising cylindrical member I6, retaining loops Il, bar I8 and handle i9. Angular alignment of retaining loops Il with tray members I2 may be assured otherwise than by the lip 22 adapted to enclose the upper end of stop portion ZI. For example, the central section of standard II may be made of square cross section and the internal opening through cylindrical member 15 may be shaped accordingly to slide thereon without relative rotation.

The radial arrangement of tray members I2 and retaining loops I1 result in a construction having a minimum of rigidity, and with such construction a minimum of stresses are caused by relatively great expansions and contractions of the component parts of the device, thus contributing to greatly increased life of the heat .treating basket. The sliding unit comprising cylindrioal member I6 and retaining loops I1 facilitates rapid removal of workpieces from the device, and eliminates the necessity to turn the device over to remove articles therefrom. The elimination of the necessity to upset the devices in strained condition also materially contributes to long life. Longer useful life of the device is also contributed to by the manufacture of the device in two main units, one comprising central standard II and tray members I2 and the other comprising cylindrical member I6 and retaining loops I'I. Since the failure of either of these units does not require discard of the entire device, the remaining serviceable unit may be combined with a new unit of the type which has failed and continue to be used.

It is to be understood thatvarious modifications and changes may be made in this invention Without departing from the spirit; and scope thereof as set forth in the appended claims.

The invention described herein may be manufactured andused by or for the Government of the United States of America vfor governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is: Y

1. A heat treating basket comprising a central standard, a plurality of tray members extending radially from the lower end of said standard, a

cylindrical member slidably enclosing said standard, and a plurality of retaining loops extending radially from said cylindrical member, said retaining loops corresponding in angular spacing to said tray members.

2. A heat treating basket comprising a central standard, a plurality of tray members extending radially from the lower end of said standard, a cylindrical member slidably enclosing said standard, a plurality oi retaining loops extending radially from said cylindrical member, said retaining loops corresponding in angular spacing to said tray members, and structural means assuring alignment of said retaining loops with said tray members.

3. A heat treating basket comprising a central standard, a plurality of tray members extending radially from the lower end of said standard, lifting means at the upper end of said standard, a cylindrical member slidably enclosing said standard, a plurality of retaining loops extending radially from said cylindrical member, said retaining loops corresponding in angular spacing to said tray members, lifting means associated with said cylindrical member whereby said cylindrical member may be moved relative to said standard, and structural means assuring alignment of said retaining loops with said tray members when said retaining loops are adjacent said tray members.

CARLO SARDO. 

